If you are a ski lover, you came to the right place! Various ski resorts are located in the area:
Nax Mont Noble: only 12 min by car! https://naxmontnoble.ch/
Evolène (https://www.evolene-region.ch/fr/live-evolene) is about 20 minutes drive from Mase.
Arolla (https://www.valdherens.ch/fr/espace-dent-blanche-secteur-ski-d-arolla-fp42182) and Vercorin (https://www.vercorin.ch/fr/Z15154/remontees-mecaniques) are 40 min by car.
Nendaz ski resort is a 45 min drive away (https://www.nendaz.ch/fr/Z13484/domaine-skiable).
Verbier Four Valleys is around 1h10 minutes drive away. (https://verbier4vallees.ch/fr/domaine-skiable/4-vallees)
If you want to go ski touring, the Nax Mont Noble rando parc offers different routes and also shows you options for ski shoe hiking:
On this map you will find all the ski option accessible in the Valley
https://www.valdherens.ch/fr/portail-ski-val-d-herens